Improvement in steam-engines



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IMPROVEMENT IN STEAM-ENGINES.-

@ln .tlgiule referer in in ilgnatttnrs utcnt mit mating tart nf the stmtTO ALL WHOM IT MAY CON CERN:

Be it known that I, Il'. TRQXEL, et" Bloomville, in the county ofSeneca, and State ot' Qhio, havelinreuted a new and useful Improvementin Steam-Engines; and I do hereby declar that the following is a full,clear, and exact description thereof', which will enable others skilledin the art to make and use the same, reference being had totheaccompanying drawings'i'orming part of this spccieation. t

This invention relates to a new and improved construction ofsteam-engines, whereby the same are greatly increased in power andeffectiveness; and the invention consists in thearrangement of severalpistons in one cylinder, and in the construction and arrangement of theparts, as will be hereinafter more fullydescribcd.

Figure 1 is a vertical longitudinal section `ot` the engine through theline a: :e o f g. 2showing the cylinder and the pistons therein, and themanner'in which the piston-rods are `connected with the main shaft.

Figure 2 is a. horizontal longitudinal section of the engine, showing,also, a `top or plan view of the conneeting-rods, main shaft, andvalve-movemen t.

lFigures 3 and"4 aredetached views of the cylinder, showing thesteam-ports and steam-valve, with the pistons represented in differentpositions in the cylinder, or as taking steam from the diifercnt ports.`

Similar letters of reference indicate corresponding parts.

A represents the cylinder. C, D, and E represent the pistons. 'lheprincipal fcaturehof my invention is operating pistons in a cylinderwithout heads, and thereby exerting the full expansive force ofthe steamupon the main shafts. Two of'these pistons, C and E, are connected witha bar, F, which slides bythe side of the cylinder (outside.) G and Harearms, .attached to the bar F, 'Io these arms thc rodsare attached uponwhich are fixed the pistonsr C and E, as'seen in the drawing. J isrtlie.rod for the piston C, and K for the piston E. The piston D is attachedto another rod, L. These rods are attached to a double crank, m, `on theend of the main shaft, by connecting-rods or pitman n and o. Thepiston-rod K is in tlie form of o. half tube or a semicirele, andthepiston-rod L is partially enclosed byit, which enables it to passthrough and work in the centreof the piston E. P P represent ^thesteam-ports. R is the exhaust-port, and S is the `inductionport.Referring again to the pistons, the arrangement is such that as theshaft revolves, the pistons D and C, and D, andE, are moved in oppositedirections, and approachcach other when opposite' the ports, as seen inthe iigs. 3 and 4, and when thus opposite, the cylinder is taking'stearnbetween the two pistons C and D, iig. 8, and exhausting it betweenthepistons Dand'E. In g.`4 the position of the pistons is reversed.There the steam is entering the cylinder between the pistons D andEgfrom the port P', and exhausting it from between the pistons C and D,through the port I. The elect of the steam is to force the pistons D Efrom each other, and the whole'oi` the moving-power thusimparted isexerted directlyon the main shaft through the double crank m. Attachedto two o f dthe pistons, C and D, as seen' in g.' 1, are springs ff,which are sg Vplaned that as the pistons approach each other, as seen infigs. 3 and 4, theV tendencypof the springis to-assist the steaminstarting or reversing thcmotion. T is vthewralve, which in thisarrangement is avery simple and ingenious device for changing the steamfrom one port to the other, as is indicated by the arrows. u is a rod,which is attached to this valve, which rod is supported by a stand orbearing at its outer end, as seen in the drawing. To operate the valveT, or-to lgive it an oscillating motion, which is the motion requiredfor opening and closing the ports or steam-apertures, there is an arm,V, on the piston-rod K. w w are-tappet-pins on the valve-rod u, whichare placed at a proper distance from each other.

It will be seen that 'as the arm V is moved hack and forth by thepiston-rod, to which it' is attached, it will strike the tappet-pins andmove the valve-rod u, and consequently oscillate the valve, thuschanging the steam from one port to the other alternately, and therebyallowing theste'am to exhaust at the same time. The power derived fromthe expansive force of steam in forcing asunder pistons ina cylinder,according to myinvention,

may be applied to every description of machinery driven by steam, withthe proper variations iin the details to adapt the engine to particularcircumstances and situations.

In applying the engine to locomotives, the main shaft would representthe axle, and the pitman n o would be connected directly with thedriving-wheel in a manner similar to that now practised.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. I claim the construction of the oscillating valve T, and arrangementof the openings S P P', and R, substantially as shown and described. 5

2. I claim the arrangement of the pistonfr-ods K and L, operating in oneand the same end of the cylinder, substantially'as shown and described.i

J.` F. TROXEL.

Witnesses s' JACOB HossLnn, W'ILLIAM DEWITT.

